The effect of air pressure, overfeed and varying blend percentage on the properties of the polyester/viscose blended air-jet textured yarns has been studied. It is observed that at lower air pressure and overfeed levels, the increasing texturing speed reduces physical bulk and at higher texturing speed the increasing overfeed increases physical bulk. Physical bulk increases with the simultaneous increase in overfeed and air pressure and it reduces with a combination of low overfeed and high texturing speed. A combination of high texturing speed and low air pressure generates lower instability in the textured yarn.